CN111552230A - Single machine automatic alignment calculation-free processing method - Google Patents
Single machine automatic alignment calculation-free processing method Download PDFInfo
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- CN111552230A CN111552230A CN202010259264.4A CN202010259264A CN111552230A CN 111552230 A CN111552230 A CN 111552230A CN 202010259264 A CN202010259264 A CN 202010259264A CN 111552230 A CN111552230 A CN 111552230A
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- 238000003672 processing method Methods 0.000 title claims description 4
- 238000000034 method Methods 0.000 claims abstract description 23
- 238000003754 machining Methods 0.000 claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000002360 preparation method Methods 0.000 abstract description 3
- 238000013075 data extraction Methods 0.000 description 2
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/19—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/35—Nc in input of data, input till input file format
- G05B2219/35349—Display part, programmed locus and tool path, traject, dynamic locus
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Abstract
The invention belongs to the technical field of numerical control machining, and particularly relates to a point-calculation-free machining method for single-machine automatic alignment. The self-made measuring head point collecting program is used, and a calculation formula is designed according to different processing requirements. And point location acquisition and automatic calculation of coordinate system offset angle point location are realized. The method solves the technical problems that in the existing production preparation process, manual point location alignment calculation offset is easy to have error and is low in efficiency. The use of this method for processing a blank datum reduces the time taken to manually straighten the product. Meanwhile, the added cross line intersection angle check and theoretical point location calibration can effectively find alignment errors or workpiece scribing errors. The program is automatically read without human intervention, thereby reducing the error rate, saving the time and improving the production efficiency.
Description
Technical Field
The invention belongs to the technical field of numerical control machining, and particularly relates to a point-calculation-free machining method for single-machine automatic alignment.
Background
For an aviation case product, a plurality of special-shaped parts need to calculate the offset of the coordinates and the angle of the actual coordinate system and the theoretical coordinate system of the workpiece through the hole system position. In the traditional method, a lever dial indicator is used for point position alignment, theoretical coordinates and actual coordinates are input through CAM software, and finally coordinate offset angles and offset are calculated. The calculated and output result also needs to teach parameters of the machine tool manually, the input and output are manual operations, errors are prone to occurring, and the whole process is complicated. There is a need for a program with point location automatic acquisition and calculation functions, which automatically performs point location alignment calculation and input, so that production preparation is automated, and production efficiency is improved.
Disclosure of Invention
The invention aims to provide a single machine calculation-free point automatic alignment processing method, which adopts a self-made measuring head point collecting program and a calculation formula designed according to different processing requirements. And point location acquisition and automatic calculation of coordinate system offset angle point location are realized.
The method solves the technical problems that in the existing production preparation process, manual point location alignment calculation offset is easy to have error and is low in efficiency.
Technical scheme
The machining method for automatic single machine alignment without calculation comprises the following steps:
1) point location acquisition is carried out on the machine tool by using a point location acquisition tool, and the point location acquisition tool is input into specified parameters;
step one, using a point position acquisition device to acquire point positions
And step two, inputting the parameters specified by the machine tool for subsequent calling.
2) And calculating the workpiece by using a four-point intersection point calculation and rotation angle calculation subprogram. This method is generally applied to a case where a normal blank is scribed and then subjected to reference processing, and the scribing of the blank is generally performed such that one straight line passing through a point a (Ax, Ay) and a point B (Bx, By) intersects with another straight line passing through a point C (Cx, Cy) and a point D (Dx, Dy) and their focal point is a point L (Lx, Ly). The included angle between the AB line and the Y direction is alpha, and the included angle between the CD line and the X direction is beta. The average rotation angle formed by the focal point L (Lx, Ly) and the reticle and the coordinate system is determined as an angle μ.
Content of calculation formula
The intersection Lx coordinates are equal to ((dot Dx-dot Ax). + (dot By dot Cx-dot Cy). + -.)/(dot Bx-dot Cx) ((dot Ay). + -. dot Dx-dot Dy). + -. dot Ax-dot Ax))/(dot Cy-dot By) ((dot Ax-dot Dx) - (dot Dx-dot Dy) ((dot Cx-dot Bx))/(dot Cy-dot Cy) ((dot Ax-dot Dx) + dot Dy dot Dx-dot Cx))/(dot Cy-dot By) (dotAx-dot Dx) - (dot Ax-dot Dy) ((dot Cx-dot By) ((dot Ax-dot Dx))
The angle alpha between the line AB and the horizontal is equal to ATAN2 (point By-point Ay, point Bx-point Ax)
The CD line has a horizontal angle beta equal to ATAN2 (point Dy-point Cy, point Dx-point Cx)
The coordinate rotation angle mu is equal to ((angle alpha-90) + angle beta)/2
The included angle between the AB line and the CD line is equal to alpha-beta
The position SQRT ((Ax-Lx) (. Ax-Lx) + (Ay-Ly) (. Ay-Ly)) of the point A in the theoretical coordinate system;
the general system comprises the following steps:
step one, adding macro program instruction capable of parameter transmission
Step two, adding theoretical coordinate values through variables
Step three, after the zero offset code to be quoted is given and the program is operated, the angle outputs a fixed position so as to be called in the main program;
the angle output R2 is the rotation angle, and the rotation can be carried out by using ROT in the program;
3) automatically bringing the calculated rotation angle and the center offset point position into corresponding parameters of the machine tool through system variables; and then, the subsequent processing program can be processed at the correct position, and automatic point calculation and alignment are realized.
And 2) performing sub-programming on the dot position calculation formula in the step one according to the system.
And 2) in the first step, the subprogram is instructed through a parameter transmission function of the numerical control system.
The 2) general system operation mode is used by taking the Siemens system as an example as follows:
the coordinates of the sampled point are respectively input as G55 being point 1, G56 being point 2, G57 being point 3 and G58 being point 4.
Run L805
G54 is the actual coordinate R2 of the intersection point as the angle value, and R2 is automatically brought into the program to rotate.
And 2) the line clip angles of the AB and the CD in the calculation program in the step one can judge the accuracy of the two lineations.
And 3) automatically inputting the result of the calculation of the subprogram into a machine tool system by using numerical control system variables.
The calculation of the angle in the 2) step one calculation procedure uses ATAN2(Y, X). This is a function of siemens and FANUC identification to calculate the point location angle with respect to the horizontal.
And 2) calculating the theoretical A point position in the program in the step one, checking whether the A point position is correct in actual processing, and judging the accuracy of calculation and alignment.
Technical effects
The use of this method for processing a blank datum reduces the time taken to manually straighten the product. Meanwhile, the added cross line intersection angle check and theoretical point location calibration can effectively find alignment errors or workpiece scribing errors. The program is automatically read without human intervention, thereby reducing the error rate, saving the time and improving the production efficiency.
Drawings
FIG. 1 is a formula diagram of the automatic alignment method;
FIG. 2 is a flow chart of the automatic alignment method.
Detailed Description
Using collection tools such as chemical needles and the like to carry out point location collection on two lines of the blank, wherein Y + direction point location input G55 is carried out, Y-direction point location input G56X + direction point location input G57X-direction point location input G58
L805
；％
；MAOPEI
R1 ═ P _ UIFR [2, X, TR ]; 2x point location data extraction
R2＝$P_UIFR[2,y,TR]；2y
R3＝$P_UIFR[3,X,TR]；3x
R4＝$P_UIFR[3,y,TR]；3y
R5＝$P_UIFR[4,X,TR]；4x
R6＝$P_UIFR[4,y,TR]；4y
R7＝$P_UIFR[5,X,TR]；5x
R8 ═ P _ UIFR [5, y, TR ]; 5y point location data extraction
R9＝R5-R7
The calculation formula of R10R 2R 3R 4R 1 is longer, and the decomposition calculation is carried out on partial data
R11＝R1-R3
R12＝R8*R5-R6*R7
R13＝R2-R4
R14＝R4*(R7-R5)
R15＝R6*(R3-R7)
R16＝R8*(R5-R3)
R17＝(R4-R2)*(R7-R5)-(R8-R6)*(R3-R1)
R18 (R9R 10+ R11R 12)/R17 calculates the X coordinate of the center intersection point
The Y-coordinate of the center intersection point was calculated from (R13 (R14+ R15+ R16))/R17+ R4 (R19 ═ Y-coordinate
R20-ATAN 2(R2-R4, R1-R3) calculates the angle between the vertical and horizontal
Calculation of horizontal Angle for R21-ATAN 2(R8-R6, R7-R5)
The intersection point is calculated by P _ UIFR [1, X, TR ] ═ R18 and automatically input into the zero offset of the machine tool
The intersection point is calculated by P _ UIFR [1, Y, TR ] ═ R19 and automatically input into the zero offset of the machine tool
R23-SQRT ((R1-R18) × (R1-R18) + (R2-R19) × (R2-R19)) calculated calibration points for in-program calibration
R2 ═ ((R20-90) + R21)/2 average angle
The variable R4-R20-R21 should normally be equal to 90 but the alignment and scribe errors will be of such value that when the variable deviates by more than 0.5, there is an error in scribing or aligning the workpiece.
When the R3-R23 output calibration point check point position is the point position in the Y + direction on the AB line, the point position moved by the adding point position X0Y-R23 in the program can determine whether there is an error in the alignment.
M17。
Claims (8)
1. The machining method for automatic single machine alignment without calculation is characterized by comprising the following steps:
1) point location acquisition is carried out on the machine tool by using a point location acquisition tool, and the point location acquisition tool is input into specified parameters;
firstly, acquiring point positions by using a point position acquisition device;
inputting the parameters specified by the machine tool for subsequent calling;
2) calculating the workpiece by using a four-point intersection point calculation and rotation angle calculation subprogram; the method is applied to the case of performing reference processing after scribing a blank, wherein the scribing of the blank is that one straight line passing through a point A (Ax, Ay) and a point B (Bx, By) is intersected with the other straight line passing through a point C (Cx, Cy) and a point D (Dx, Dy) and the focus of the straight line is a point L (Lx, Ly); the included angle between the AB line and the Y direction is alpha, and the included angle between the CD line and the X direction is beta; calculating the average rotation angle formed by the focal point L (Lx, Ly), the cross line and the coordinate system as an angle mu;
content of calculation formula
The intersection Lx coordinates are equal to ((point Dx-point Ax) × (point By × point Cx-point Cy × point Bx) + (point Bx-point Cx) × (point Ay × point Dx-point Dy × point Ax))/(point Cy-point By) ((point Ax-point Dx) - (point Dx-point Dy) ((point Cx-point Bx); the intersection point Ly coordinates are equal to ((point By-point Cy) × (point Cy × point Ax-point Dx) + point Dy × point Cx- (point Cx-point Ax) + point Ay + point Dx-point Cx))/(point Cy-point By) ((point Ax-point Dx) - (point Ax-point Dy) × (point Cx-point Bx);
the angle alpha between the line AB and the horizontal is equal to ATAN2 (point By-point Ay, point Bx-point Ax);
the CD line has a horizontal angle beta equal to ATAN2 (point Dy-point Cy, point Dx-point Cx);
the coordinate rotation angle μ is equal to ((angle α -90) + angle β)/2;
the included angle between the AB line and the CD line is equal to alpha-beta;
the position SQRT ((Ax-Lx) (. Ax-Lx) + (Ay-Ly) (. Ay-Ly)) of the point A in the theoretical coordinate system;
the general system comprises the following steps:
step one, adding macro program instruction capable of parameter transmission
Step two, adding theoretical coordinate values through variables
Step three gives zero-offset code to be referred to
After the program is operated, the angle outputs a fixed position so as to be called in the main program;
the angle output R2 is the rotation angle, and the rotation can be carried out by using ROT in the program;
3) automatically bringing the calculated rotation angle and the center offset point position into corresponding parameters of the machine tool through system variables; and then, the subsequent processing program can be processed at the correct position, and automatic point calculation and alignment are realized.
2. The single-machine automatic alignment calculation-free machining method as claimed in claim 1, wherein the position calculation formula in step 2) is sub-programmed according to a system.
3. The single-machine automatic alignment calculation-free machining method according to claim 1, wherein in the step 2), the subprogram is instructed by a numerical control system parameter transfer function.
4. The stand-alone automatic alignment point-free processing method according to claim 1, wherein the 2) general system operation mode is as follows, using a Siemens system as an example:
respectively inputting the coordinates of the sampled point to G55 as point 1, G56 as point 2, G57 as point 3 and G58 as point 4;
run L805
G54 is the actual coordinate R2 of the intersection point as the angle value, and R2 is automatically brought into the program to rotate.
5. The machining method for single machine automatic alignment without point calculation according to claim 1, wherein the sizes of the line clip angles of the AB and CD in the calculation procedure of the step one of 2) can judge the accuracy of the two scribing lines.
6. The stand-alone automatic alignment calculation-free machining method according to claim 1, wherein the numerical control system variables in 3) are used to automatically input the result of the subroutine calculation into the machine tool system.
7. The stand-alone automatic alignment point-free machining method according to claim 1, wherein the angle in the step 2) calculation procedure is calculated by using ATAN2(Y, X).
8. The single-machine automatic alignment calculation-free machining method according to claim 1, wherein the theoretical A point position in the calculation program in step 2) is checked to determine whether the A point position is correct in the actual machining process, so that the accuracy of calculation and alignment can be judged.
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Application publication date: 20200818 |